碩士 / 國立聯合大學 / 環境與安全衛生工程學系碩士班 / 96 / The capability of algae to absorb the CO2, a greenhouse gas, for carrying out photosynthesis has been emphasized in recent years for the potential of growing algae in large quantity as sources of bio-energy. Therefore, the technology of rapidly separating the algal mass from the highly concentrated suspension is importance and should not be ignored. Algae cells are small and light, their separation from the liquid is somewhat difficult. The current available technology to grow algae and separate the algal mass using, centrifuge, requires high energy consumption and hence is not economical feasible. In this research, Poly Aluminum Chloride (PAC) with high basicity is used as a chemical coagulant in Jar Test to perform the soli-liquid separation study on two algal species, i.e. chlorella sp. and Spirulina sp., suspended in fresh water and sea water. A Nephelometric turbidimeter coupled with a data acquisition unit was used to measure water turbidity every second in coagulation process. Laboratory results indicated that the standard deviation (SD) of the measured turbidity in slow mixing period was proportional to the square root of the floc size; a greater SD indicated larger floc sizes. Also, a CCD (Charge Coupled Device) with image analysis (Matrox Inspector V2.2) confirm this Nephelometric technology is suitable for directly applying to particle size analysis in flocculation process. Hence, the Nephelometric turbidimeter monitoring system may be used as a tool to assist determine dosing, effective selection of the coagulant and control of the flocculation conditions then help saving cost in water treatment plant.
| Identifer | oai:union.ndltd.org:TW/096NUUM5515006 |
| Date | January 2008 |
| Creators | Wei -Yi Chen, 陳瑋儀 |
| Contributors | Wen- Po Cheng, 鄭文伯 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 132 |
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